广州市热岛效应与城市露水相互关系研究

发布时间：2018-08-13 11:56

【摘要】：关于城市热岛效应的研究较多,而关于城市露水的研究较少,尤其是城市热岛作用下的城市露水研究则更少。探清城市露水与城市热岛的关系对增进城市露水凝结,改善城市水分平衡具有重要意义。为研究两者的相互关系,采用布片法(Cloth-plate Method)分别在广州的露水高发季节(8—11月,含秋季代表月份10月)和其他几个代表季节的1月(冬季)、4月(春季)、7月(夏季)进行了露水收集;采用常用的城郊平均温差表示热岛的统计方法对热岛进行统计分析;露水收集和热岛监测的4个点位分别选在广州的工业区、商业区、居住区、森林公园,为了比较分析也增设了郊区对照点位。结果显示,无论白天、夜间还是日平均热岛频率,其与城市露水均不存在显著的相关关系,即使城市地区存在高频率的热岛效应,也难以完全阻碍露水事件发生,无露水发生的天气其热岛频率比有露水发生时高10%左右。不论是白天、夜间还是日平均热岛强度,它们都与城市夜间露水量呈极显著负相关,城市各功能区露水量差异与该功能区内热岛强弱不无关系。城市热岛与城市露水的相互关系受多种因素的影响,热岛可能通过影响相对湿度、蒸发量来影响露水形成。结果表明,无热岛效应可能更有利于露水发生,热岛强度变化将直接影响露水凝结量的大小。
[Abstract]:There are more studies on urban heat island effect, but less on urban dew, especially on urban dew under the action of urban heat island. It is important to explore the relationship between urban dew and urban heat island to promote condensation of urban dew and to improve urban water balance. In order to study the relationship between the two, the Cloth-plate Method method was used in the high dewdrop season in Guangzhou (August to November). Dew water was collected in January (winter), April (spring), July (summer) and other typical seasons. The four spots of dew water collection and heat island monitoring were selected respectively in industrial area, commercial district, residential area and forest park in Guangzhou. The results showed that there was no significant correlation between the daily average heat island frequency and urban dew, even if there was a high frequency heat island effect in urban areas, it was difficult to completely hinder the occurrence of dew events, even if there was a high frequency heat island effect in urban areas. The frequency of heat island in the weather without dew is about 10% higher than that when dew occurs. Both day, night and daily mean heat island intensity are negatively correlated with the urban nighttime dew, and the difference between the urban function areas and the intensity of the heat island in the urban function area is related to the intensity of the heat island. The relationship between urban heat island and urban dew is affected by many factors, and the formation of dew may be affected by the influence of relative humidity and evaporation. The results show that the heat island effect may be more favorable to the occurrence of dew, and the change of heat island strength will directly affect the amount of dew condensation.
【作者单位】：国家环境保护饮用水水源地管理技术重点实验室//深圳市环境科学研究院;中山大学有害生物控制及资源利用国家重点实验室;河南科技学院园林学院;
【基金】：国家重点研发计划项目(2016YFC0502800) 国家自然科学基金项目(30670385) 广东省特聘教授(珠江学者)基金项目深圳市环境科技计划项目(0708-144106ZXY030;SZZZ2015-C0007;LD2015GP-SZC055)
【分类号】：X16;P426.321

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